Engineering Study Guide: Engineering books and study guides: Electronics: Synthesis, characterization, and mechanical properties of an injection moldable polyimide based on 1,4-diaminobutane.: An article from: Polymer Engineering and Science

Location: Home » Electronics » Synthesis, characterization, and mechanical properties of an injection moldable polyimide based on 1,4-diaminobutane.: An article from: Polymer Engineering and Science

Synthesis, characterization, and mechanical properties of an injection moldable polyimide based on 1,4-diaminobutane.: An article from: Polymer Engineering and Science
	Authors: Cor Koning, Liliane Teuwen, Markus Bulters Publisher: Society of Plastics Engineers, Inc. Buy New: $5.95 as of 2/10/2012 21:18 MST details In Stock Seller: Amazon.com Format: HTML Language: English (Published) Media: Digital Pages: 14 ASIN: B00096KMOO Publication Date: May 1, 1996 Availability: Available for download now



Editorial Reviews: Product Description This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on May 1, 1996. The length of the article is 4184 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser. From the author: A partially aliphatic polyimide was synthesized in a two-step process in N-methylpyrrolidone (NMP) from 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) and 1,4-diaminobutane (DAB). Weight average molecular weights ranging from 35,000 to over 160,000 were obtained by adding different amounts of the chain stopper phthalic anhydride, or by using a slight excess of BTDA. Rheological measurements, supported by a size exclusion chromatography (SEC) analysis before and after injection molding, point to branching or even partial crosslinking during molding of poly(BTDA-DAB) if reactive amine endgroups are present. By reacting these amine endgroups with benzoyl chloride, branching is limited and a more Newtonian flow is observed. Both non-endcapped and endcapped reactor powders are [approximately]60% crystalline (Tg = 170 to 175 [degrees] C, Tm = 290 to 300 [degrees] C), but according to wide and small angle X-ray scattering (WAXS and SAXS) studies on test bars, both the more linear polyimides and their branched counterparts are fully amorphous after injection molding. Nevertheless, poly(BTDA-DAB) shows interesting mechanical properties like a bending modulus of [approximately]3.9 GPa, a tensile strength of [approximately]130 MPa, a tensile elongation at break of [approximately]13%, and a notched Izod impact of [approximately]4 kJ/[m.sup.2]. Citation Details Title: Synthesis, characterization, and mechanical properties of an injection moldable polyimide based on 1,4-diaminobutane. Author: Cor Koning Publication: Polymer Engineering and Science (Refereed) Date: May 1, 1996 Publisher: Society of Plastics Engineers, Inc. Volume: v36 Issue: n10 Page: p1347(8) Distributed by Thomson Gale

Custom Search

CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED ‘AS IS’ AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.